To address the problem of measuring the complex permittivity of mixtures of geological materials (homogeneous or mixtures) at RF frequencies (10MHz – 3 GHz), specific techniques are to be developed.
The main challenge of measuring this kind of mixtures is that each component could have a different state of aggregation (solid, liquid) and conglomeration (e.g. homogeneous, porous, granular). Traditional methods (i.e. capacitive fixture, waveguide, open-end coaxial probe) have been improved by exploiting dedicated procedures and processing.